Transmission and Diff Oil

Smudgemanuk

Zorg Legend
British Zeds
Joined
Dec 1, 2024
Points
73
Location
Bicester, Oxford
Model of Z
2.8l TU pre-facelift z3
Hi all,

I know there has been lots of threads on this subject over the years and yes I have read as many as I can

Transmission
Some mentioned that the transmission oil used depends on the sticker on the box.
My sticker is yellow
So what oil is best for it? People recommend redline d4 but I dont know which sticker that is suitable for


Diff
It seems to be a very 50/50 split between people who put 75w-90 and 75w140 in the 25% torsen LSD's so I assume is does not matter too much
I am slightly more inclined to go for 75w-90 as it will be a daily driver even through winter, so the diff will be on the cooler side most of the time
I assume that logic tracks....

Any advice much appreciated, thank you
 

AntStark

Zorg Guru (III)
Supporter
British Zeds
Joined
May 15, 2021
Points
143
Location
Hampshire
Model of Z
2002 3.0 Sport
Diff doesn’t matter so much..just go for the best quality you can afford as a) price difference isn’t that great and b) Unlikely to need doing again unless you plan doing spaceship miles. I went for Castrol Transmax as it was on offer at Opie
 

Nodzed

Zorg Expert (II)
Supporter
British Zeds
M Power
Joined
Feb 18, 2016
Points
231
Location
Forest of Dean, Gloucestershire, England
Model of Z
Z3M Imola and Z4 (e89)
75W-80 or 75W-90 Any good quality GL-4 rated fluid, dont use GL-5 for the box
75W-90 for the diff, as said any good quality brand.
 
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